Resynchronization method for decoding video

Abstract

The present invention relates to a method of resynchronization that attempts to enable a resynchronization of a compressed video data signal received by a decoder, after a transmission error has been detected in said compressed video data signal. The method of resynchronization is based on the use of a resynchronization word. In order to ensure a proper decoding of the compressed video data signal the resynchronization word is distinguishable from the known VLC words as well as the VOP start code.

1. A method of resynchronization of a compressed video data signal received by a decoder, comprising a step of detecting a resynchronization word in the compressed video data signal and a step of synchronizing a decoding of the compressed video data signal from the detection of the resynchronization word, characterized in that the detection step is adapted to detect a resynchronization word that comprises at least 17 successive zeros followed by a one for video data corresponding to a bidirectionally predictive coded video object plane. 
     
     
       2. A video decoder for receiving a compressed video data signal, comprising a detector for detecting a resynchronization word in the compressed video data signal and a synchronizer for resynchronizing a decoding of the compressed video data signal from the detection of the resynchronization word, characterized in that said detector is adapted to detect a resynchronization word that comprises at least 17 successive zeros followed by a one for video data corresponding to a bidirectionally predictive coded video object plane. 
     
     
       3. A method of inserting a resynchronization word into a compressed video data signal supplied by an encoder, characterized in that said method is adapted to insert a resynchronization word that comprises at least 17 successive zeros followed by a one for video data corresponding to a bidirectionally predictive coded video object plane. 
     
     
       4. A video encoder for supplying a compressed video data signal and comprising means for inserting a resynchronization word into the compressed video data signal, characterized in that means for inserting are adapted to insert a resynchronization word that comprises at least 17 successive zeros followed by a one for video data corresponding to a bidirectionally predictive coded video object plane. 
     
     
       5. A computer program product for a video decoder that comprises a set of instructions which, when loaded into the decoder, causes the decoder to carry out the method of resynchronization of a compressed video data signal received by a decoder, comprising a stp of detecting a resynchronization word in the compressed video data signal and a step of synchronizing a decoding of the compressed video data signal from the detection of the resynchronization word, characterized in that the detection step is adapted to detect a resynchronization word that comprises at least 17 successive zeros followed by one for video data corresponding to a bidirectionally predictive video object plan. 
     
     
       6. A computer program product for a video encoder that comprises a set of instructions, which when loaded into the encoder, causes the encoder to carry out the method of inserting a resynchronization word into a compressed video data signal supplied by an encoder, characterized in that said method is adapted to insert a resynchronization word that comprises at least 17 successive zeros followed by a one for video data corresponding to a bidirectionally predictive coded video object plane.